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Question: SAT scores. The scale for SAT exam scores is set so that the distribution of scores is approximately Normal with mean 500 and standard deviation 100. Answer these questions without using a table.
(a) What is the median SAT score?
(b) You run a tutoring service for students who score between 400 and 600 and hope to attract many students. What percentage of SAT scores are between 400 and 600?
(a) Determine the probability that both parts in the sample are defective by computing a conditional probability. (b) Determine the answer to part (a) by using the subset approach that was described in this section.
A standard deviation of $3000. find the salaries for teachers in the bottom 10% and upper 10%, then transform from a z score to an x-score.
an experiment was performed to investigate the keyboard feel on a computer crisp or mushy and the size of the keys
a find the area under the standard normal curve between z -1.9 and z 1.17 p-1.9 lt z lt 1.17. give your answer
Run a regression analysis of the data and determine whether there is a linear relationship between inflation and total return on stocks for the periods under study.
captain ds tuna is sold in cans that have a net weight of 8 ounces. the weights are normally distributed with a mean of
The following are characteristics of the scientific method except for: (a) the definition of the problem in specific terms
We modify the M/M/1/4 queueing system as follows: the server always waits until there are at least two customers in the system before serving them, two at a time, at an exponential rate μ.
a community-based study of respiratory illness during the first year of life was conducted in north carolina. as part
(1) You should start by running the same test he did in which he came to the decision that he could not conclude a difference. (2) Perform the test as it should have been done and find if you come to a different conclusion. (3) Explain why the result..
data on the number of occurrences per time period and observed frequencies follow. compute the value of the test
Develop a prediction equation. Comment on the usefulness of the equation to make predictions (SEE, No Image, F-test, and slope coefficient significance).
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